28368565536 has 24 divisors (see below), whose sum is σ = 74467484784. Its totient is φ = 9456188480.

The previous prime is 28368565507. The next prime is 28368565541. The reversal of 28368565536 is 63556586382.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147752850 + ... + 147753041.

It is an arithmetic number, because the mean of its divisors is an integer number (3102811866).

Almost surely, 2^28368565536 is an apocalyptic number.

It is an amenable number.

28368565536 is an abundant number, since it is smaller than the sum of its proper divisors (46098919248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28368565536 is a wasteful number, since it uses less digits than its factorization.

28368565536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295505904 (or 295505896 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 57.

The spelling of 28368565536 in words is "twenty-eight billion, three hundred sixty-eight million, five hundred sixty-five thousand, five hundred thirty-six".